Permatex 81878, Silicone, Copper Maximum Temp Gasket Maker Industrial Sealant, 3 oz
Permatex 81878, Silicone, Copper Maximum Temp Gasket Maker Industrial Sealant, 3 oz
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Permatex 81878, Silicone, Copper Maximum Temp Gasket Maker Industrial Sealant, 3 oz

|34 ratings

Key item features

  • Extreme Temperature: This copper-based silicone gasket maker is engineered for high operating temperatures, withstanding a continuous range from -65°F to 700°F (-54°C to 371°C) and intermittent peaks.
  • Specialized Applications: Ideal for demanding environments, it is specifically designed for use in turbocharger applications and exhaust systems where high heat resistance is crucial.
  • Fluid Resistance: The sealant effectively resists degradation from various automotive and shop fluids, ensuring long-lasting performance and seal integrity.
  • Vibration Dampening: Formulated to resist vibration, this gasket maker maintains a secure seal even in dynamic and high-stress operational conditions.
  • Engine Safe: Featuring a sensor-safe, low odor, and non-corrosive formulation, it protects sensitive engine components and ensures compatibility with modern vehicle systems.
  • OEM Exceeding: Tested to surpass original equipment manufacturer (OEM) specifications, providing reliable performance for critical sealing needs.
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4.9 out of 5 stars
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34 ratings31 reviews
How item rating is calculated
  1. 5 stars85% (29)
  2. 4 stars15% (5)
  3. 3 stars0% (0)
  4. 2 stars0% (0)
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Showing 1-3 of 31 reviews

Feb 15, 2026
Reviewer name: Landon P
5 out of 5 stars
5 out of 5 stars review

Seller Verified Purchase

Works great

Worked breath repacking my silencer and was a pretty fast cure haven't noticed any splooge where I applied it either

Review from Rocky Mountain ATV
Helpful?2YGD96UY6ZQS19278837
Aug 29, 2026
Reviewer name: David B
5 out of 5 stars
5 out of 5 stars review

Seller Verified Purchase

Great product, easy to use too.

Great product to use on slip on exhaust joints. No leaks, but you can separate it if you want to change out exhaust. Easy to apply and cures relatively quickly too.

Incentivized Review
Review from Rocky Mountain ATV
Helpful?2YGD96UY6ZQS19278837
Feb 11, 2025
Reviewer name: Robert
Sold and shipped byHeintz Sales
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Sealed Hole In Muffler

The product worked as advertised.

Incentivized Review
Helpful?2YGD96UY6ZQS19278837
Current price is $11.56
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Sold and shipped by Crimp Supply
4.362264150943396 out of 5 stars
4.362264150943396 stars out of 5, based on 530 seller reviews(4.4)
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